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. 2015 Oct 27;5:15726. doi: 10.1038/srep15726

Figure 2.

Figure 2

(a) Concept of active stabilization of the interferometer unbalance arm length by zero-phase locking of the embedded homodyne interferometer phase signal. (b) (Experiment) Zero-phase locking signals before and after stabilization. (c) Frequency distribution of the stabilized zero-phase locking signal with a magnified view (inset).